TK-90
116
LEVEL DIAGRAM /
Receiver Section /
ANT
XF101
Q251
XF252
Pre OFF
Q103
Pre amp
–113dBm –112dBm
Final
unit
–111dBm –111dBm
–105dBm
–106dBm
–98dBm
–101dBm
–88dBm
–92.5dBm
–60dBm
–71.5dBm
–55dBm –29dBm
7dBm
73.095MHz
13.2MHz
TX-RX unit
TX-RX unit
Display
unit
CN2
RAT
D5
D8
D104
D103
BPF
D106
D107
D183
2nd mixer
D182
Q107
1st mixer
Q183
Q185
D252
D185
D256
D184
D258
Q451
Q452
D452
6
1
IC451
7
1
IC452
2
3
IC453
Q459
8
11
IC521
Q521
–15dBm
0.2Vp-p
0.6Vp-p
0.67Vrms
4
Ω
4mVp-p
10.695MHz
AF
L112
L120
L186
L190
L451
L452
10.695MHz
73.095MHz
TX-RX unit
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ppd
Measuring equipment
Spectrum analyzer
Oscilloscope
SSG
Measuring condition
RX frequency: 13.2MHz
Mode: USB (Pre amp: ON)
Antenna input: –113dBm
Audio output: Level 8
DEO output: Level 4
External speaker output : 4
Ω
terminated
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Ω